Correct option should be either (B) or (C).

Option (B) is incorrect for the perfect squares.

if we consider option (B), for 4 answer will be 3, for 25 answer will be 6.

While option(C) gives correct answer always.

Option (B) is incorrect for the perfect squares.

if we consider option (B), for 4 answer will be 3, for 25 answer will be 6.

While option(C) gives correct answer always.